If your destination is east of Village Center Drive (shown in blue), use Yorba Linda Boulevard/Weir Canyon Road from the Riverside Freeway to get to and from your destination. If your destination is west of Village Center, use Imperial Highway to the greatest extent possible to get to and from your destination.
Mouth ulcers are caused by many disorders. These include: 1  Canker sores. 2  Gingivostomatitis. 3  Herpes simplex (fever blister). 4  Leukoplakia. 5  Oral cancer. 6  Oral lichen planus.
Diagnosing many common causes of mouth ulcers, such as oral thrush, cold sores and canker sores, can often be made by the symptoms and the appearance of the mouth ulcers. Making a diagnosis of mouth ulcers may also include performing a variety of tests to help to diagnose potential underlying diseases, conditions or disorders, such as oral cancer and leukoplakia.